PYTHON-4476 Separate data and IO classes more effectively #487

Job	Run time
Make SDist	35s
Build wheels for manylinux_x86_64	2m 2s
Build wheels for manylinux_aarch64	8m 46s
Build wheels for manylinux_ppc64le	8m 9s
Build wheels for manylinux_s390x	9m 8s
Build wheels for manylinux_i686	2m 18s
Build wheels for win_amd6	5m 23s
Build wheels for win32	5m 23s
Build wheels for macos	2m 41s
Download Wheels	10s
publish	0s
	44m 35s

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